Mechanical arm clamping device

Abstract

The utility model discloses a mechanical arm clamping device. Relates to the field of machining, and solves the problem that a common external clamp is difficult to directly act on an inner hole plane due to the fact that the inner hole plane of an existing workpiece is located inside a middle hole of the workpiece and the operation space of the clamp is relatively narrow. The device comprises a top cylinder rack, a sliding arm, a left rotating clamping plate, a right rotating clamping plate, a floating block, a floating block rotating shaft and a reset block, a sliding arm, a left rotating clamping plate, a right rotating clamping plate and a floating block are installed in the top cylinder rack, the sliding arm is installed in the middle of the top cylinder rack, the left rotating clamping plate and the right rotating clamping plate are rotationally connected with the top cylinder rack through rotating shafts, and a reset block is fixedly connected to the position, close to the top end, of the sliding arm. The floating block is rotationally connected with the sliding arm through a floating block rotating shaft, and when the top plane of the floating block makes contact with the left rotating clamping plate and the right rotating clamping plate, the floating block drives the left rotating clamping plate and the right rotating clamping plate to rotate. The positioning and clamping device is applied to the field of positioning and clamping of workpieces.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of machining, concretely relates to a mechanical arm clamping device. BACKGROUND

[0002] At present, when positioning and clamping workpieces in welding fixtures, machining fixtures and non-standard automation, the shape, size and material properties of the workpieces need to be considered. For irregularly shaped workpieces, special-shaped clamping jaws may need to be designed to fit the surface of the workpiece to ensure uniform distribution of clamping force.

[0003] At present, when clamping workpieces with inner hole bottom planes, position accuracy needs to be ensured by clamping the inner hole to restrict the movement and rotation of the workpiece and ensure that the position accuracy of machining meets the requirements. Secondly, machining safety needs to be ensured. If the workpiece is not clamped, the workpiece is prone to displacement during high-speed rotating tool machining due to cutting force, which not only damages the workpiece and tool, but also may cause safety accidents. Spattering workpiece fragments or out-of-control tools may cause harm to operators.

[0004] However, since the inner hole plane is inside the hole, the operating space of the clamp is relatively small. Ordinary external clamps cannot directly act on the inner hole plane. Common clamps such as flat-nose pliers cannot directly extend in for clamping, and special internal clamps are needed, but these clamps are often complex in structure and poor in universality. SUMMARY

[0005] The utility model discloses a mechanical arm clamping device to solve the problem that the operating space of the clamp is relatively small because the inner hole plane is inside the hole of the workpiece, and ordinary external clamps cannot directly act on the inner hole plane.

[0006] The technical scheme of the utility model is:

[0007] A mechanical arm clamping device comprises a top cylinder rack, a sliding arm, a left rotating clamp plate, a right rotating clamp plate, a floating block, a floating block rotating shaft and a reset block.

[0008] The sliding arm, the left rotating clamp plate, the right rotating clamp plate and the floating block are respectively installed in the top cylinder rack, the sliding arm is installed at the middle position of the top cylinder rack, and the top cylinder rack vertically slides up and down in the top cylinder rack, the left rotating clamp plate and the right rotating clamp plate are rotationally connected between the rotating shaft and the top cylinder rack, the reset block is fixedly connected to the top end position of the sliding arm, the longitudinal center line of the reset block and the longitudinal center line of the floating block are on the same plane, the floating block is rotationally connected between the floating block rotating shaft and the sliding arm, and when the top plane of the floating block is in contact with the left rotating clamp plate and the right rotating clamp plate, the floating block drives the left rotating clamp plate and the right rotating clamp plate to rotate.

[0009] The top cylinder bench is provided with clamping plate grooves on both sides, and the left rotating clamping plate and the right rotating clamping plate rotate in the clamping plate grooves.

[0010] Further, the sliding arms are symmetrically connected with ear plates on both sides, the ear plates are rotationally connected with one end of a rotating rod through a shaft body, and the other end of the rotating rod is rotationally connected with the side surface of a threaded sleeve through a shaft body.

[0011] The threaded sleeve is screwed into a lead screw, and one end of the lead screw is rotationally connected with the output shaft of a motor.

[0012] Further, the lead screw is a bidirectional threaded lead screw structure, and the lead screw drives the two threaded sleeves to move horizontally along the direction of the lead screw when the lead screw rotates.

[0013] Further, the lead screw is rotationally connected with a bearing seat, the bearing seat is installed on a column on the workbench, and the top of the column is vertically connected with a table plate to form the workbench.

[0014] Further, the top of the workbench is connected with a base of an annular structure, a sliding hole is formed in the middle position of the workbench, a sliding arm is inserted into the inner side of the sliding hole, and the sliding arm vertically slides up and down in the sliding hole.

[0015] Further, a plug rod is installed in the top plate of the top cylinder bench, the plug rod is vertically fixedly connected with the middle position of the top plate of the top cylinder bench, a compression spring is sleeved on the plug rod, and the bottom of the compression spring abuts against the top end of a reset block.

[0016] Further, a hole position for inserting the plug rod is formed in the reset block, and the plug rod is inserted into the reset block.

[0017] Further, the left rotating clamping plate and the right rotating clamping plate are of the same structure, and the two ends of the left rotating clamping plate and the right rotating clamping plate adopt an eagle mouth structure.

[0018] Further, the reset block is provided with a slope structure below, when the reset block vertically moves downward, the slope structure is matched with the slope at the positions of the left rotating clamping plate and the right rotating clamping plate, so as to drive the left rotating clamping plate and the right rotating clamping plate to rotate.

[0019] Further, the base is placed with a clamped workpiece, and the clamped workpiece is provided with an inner hole plane.

[0020] Compared with the prior art, the utility model has the following effects:

[0021] The utility model can position and clamp the workpiece in non-standard automation, ensure position precision, limit the movement and rotation of the workpiece, and ensure that the position precision of machining meets the requirements.

[0022] This invention enables clamping of the internal plane of a hole, avoiding the relatively limited operating space of traditional clamps. Ordinary external clamps cannot directly act on the internal plane of the hole, thus solving the problem of not being able to directly insert and clamp, and ensuring clamping of the internal stepped surface of the workpiece.

[0023] This utility model is equipped with a top cylinder platform, which contains a left rotating clamping plate, a right rotating clamping plate, and a floating block. When the sliding arm moves vertically up and down, it pushes the floating block to move. By rotating the floating block, the rotation angle between the left rotating clamping plate and the right rotating clamping plate is changed. This not only clamps the internal plane of the workpiece hole, but also clamps the planes of different thicknesses inside the workpiece.

[0024] When clamping the workpiece, the motor drives the lead screw to rotate, causing the two threaded sleeves on the lead screw to move horizontally along the direction of the lead screw. The threaded sleeves drive the rotating rod to rotate synchronously, which in turn pushes the sliding arm to move. The sliding arm drives the floating block to move synchronously, so that the plane of the floating block rotates with the left and right rotating clamping plates respectively. This causes the outer beak structure of the left and right rotating clamping plates to press down onto the inner hole plane of the workpiece, thus clamping the workpiece by the left and right rotating clamping plates. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure when a clamped workpiece is installed;

[0027] Figure 3 yes Figure 1 A sectional view of the top cylinder platform in the middle;

[0028] Figure 4 This is a schematic diagram of the structure of this utility model when clamping the inner hole plane;

[0029] Figure 5 This is a schematic diagram of the structure of this utility model when clamping inner hole planes of different thicknesses;

[0030] Figure 6 This is a schematic diagram showing the connection between the sliding arm and the floating block;

[0031] Figure 7 yes Figure 6 Side view;

[0032] Figure 8 This is a structural schematic diagram of the top cylinder platform;

[0033] Figure 9 This is a sectional view of the top cylinder platform;

[0034] In the diagram: 1. Top cylinder frame, 2. Sliding arm, 3. Left rotating clamping plate, 4. Right rotating clamping plate, 5. Floating block, 6. Floating block shaft, 7. Reset block, 8. Ear plate, 9. Rotating rod, 10. Threaded sleeve, 11. Lead screw, 12. Motor, 13. Bearing seat, 14. Column, 15. Platform, 16. Base, 17. Sliding hole, 18. Insert rod, 19. Compression spring, 20. Clamping plate groove, 21. Clamping workpiece, 22. Inner hole plane. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0036] Specific implementation method one: Combining Figure 1 — Figure 5 This embodiment describes a robotic arm clamping device, which includes a top cylinder platform 1, a sliding arm 2, a left rotating clamping plate 3, a right rotating clamping plate 4, a floating block 5, a floating block rotating shaft 6, and a reset block 7.

[0037] The top cylinder platform 1 is equipped with a sliding arm 2, a left rotating clamping plate 3, a right rotating clamping plate 4, and a floating block 5. The sliding arm 2 is installed in the middle of the top cylinder platform 1, and the top cylinder platform 1 slides vertically up and down inside the top cylinder platform 1. The left rotating clamping plate 3 and the right rotating clamping plate 4 are rotatably connected to the top cylinder platform 1 through a rotating shaft. A reset block 7 is fixedly connected to the top of the sliding arm 2. The longitudinal center line of the reset block 7 is on the same plane as the longitudinal center line of the floating block 5. The floating block 5 is rotatably connected to the sliding arm 2 through a floating block rotating shaft 6. When the top plane of the floating block 5 contacts the left rotating clamping plate 3 and the right rotating clamping plate 4, the floating block 5 drives the left rotating clamping plate 3 and the right rotating clamping plate 4 to rotate.

[0038] The top cylinder platform 1 has clamping grooves 20 on both sides, and the left-rotating clamping plate 3 and the right-rotating clamping plate 4 rotate in the clamping grooves 20.

[0039] The top cylinder frame 1 is a rectangular structure with arc-shaped corners. The top of the top cylinder frame 1 is a closed structure, and the bottom of the top cylinder frame 1 is an open structure. The top cylinder frame 1 is fixedly connected to the workbench and is located in the middle of the workbench.

[0040] Specific Implementation Method Two: Combining Figure 1 — Figure 5This embodiment describes a robotic arm clamping device in which ear plates 8 are symmetrically connected on both sides of the sliding arm 2. One end of the ear plate is rotatably connected to one end of the rotating rod 9 via a shaft, and the other end of the rotating rod 9 is rotatably connected to the side of the threaded sleeve 10 via a shaft.

[0041] A lead screw 11 is screwed into the threaded sleeve 10, and one end of the lead screw 11 is rotatably connected to the output shaft of the motor 12.

[0042] The sliding arm 2 is a cylindrical or rectangular structure. The end of the ear plate is fixedly connected to the side of the sliding arm by welding. The rotating rod 9 has holes at both ends, and the hole at one end of the rotating rod 9 is aligned with the hole on the ear plate and then rotated through a shaft. The other end of the rotating rod 9 is connected to the shaft on the threaded sleeve 10, so that the rotating rod 9 can rotate between the sliding arm 2 and the threaded sleeve 10.

[0043] Specific implementation method three: Combining Figure 1 — Figure 5 This embodiment describes a robotic arm clamping device, wherein the lead screw 11 is a bidirectional threaded lead screw structure, and when the lead screw 11 rotates, it drives two threaded sleeves 10 to move horizontally along the direction of the lead screw 11.

[0044] The threaded sleeves 10 have the same structure. One side of the lead screw 11 has a forward external thread structure, and the other side has a reverse external thread structure. When the lead screw 11 rotates, the two threaded sleeves 10 on the lead screw 11 move synchronously in opposite directions, thereby adjusting the distance between the two threaded sleeves 10.

[0045] Specific Implementation Method Four: Referring to the diagram Figure 1 — Figure 5 This embodiment describes a robotic arm clamping device in which the lead screw 11 is rotatably connected to the bearing seat 13, the bearing seat 13 is mounted on the column 14 on the workbench, and the top of the column 14 is vertically connected to the table plate 15 to form the workbench.

[0046] The column 14 is a hollow rectangular structure, and bearing seats 13 are installed on the inner side of the column 14. The two ends of the lead screw 11 are fixed on the inner ring surface of the bearing seat 13, so that the lead screw 11 can rotate. The platform 15 is a rectangular steel plate structure, and the column 14 and the platform 15 are fixed together by welding, which plays a supporting role for the top cylinder frame 1.

[0047] Specific Implementation Method Five: Combining Figure 1 — Figure 5This embodiment describes a robotic arm clamping device. The top of the worktable is connected to a ring-shaped base 16. A sliding hole 17 is provided in the middle of the worktable. A sliding arm 2 is inserted into the inner side of the sliding hole 17 and slides vertically up and down within the sliding hole 17.

[0048] The base 16 is a square tube structure or made of rubber. The size of the sliding hole 17 is larger than the size of the sliding arm 2, so that the sliding arm 2 can move along the direction of the sliding hole 17.

[0049] Specific Implementation Method Six: Combination Figure 1 — Figure 5 This embodiment describes a robotic arm clamping device. A rod 18 is installed inside the top plate of the top cylinder platform 1. The rod 18 is vertically and fixedly connected to the middle position of the top plate of the top cylinder platform 1. A compression spring 19 is sleeved on the rod 18, and the bottom of the compression spring 19 abuts against the top of the reset block 7.

[0050] The insertion rod 18 is a cylindrical rod structure, and the top of the insertion rod 18 is fixed to the top plate of the top cylinder platform 1 by welding. The compression spring 19 stores energy, and the top of the compression spring 19 rests against the top of the reset block 7. When the sliding arm 2 is pressed down, the sliding arm 2 drives the reset block 7 to move together. When the reset block 7 is pressed down, the compression spring 19 releases its elastic force, which reduces mechanical transmission error and further presses the left rotating clamp 4 and the right rotating clamp 5 to prevent loosening after long-term use.

[0051] Specific implementation method seven: Combining Figure 6 and Figure 7 This embodiment describes a robotic arm clamping device in which a hole for inserting a rod 18 is provided on the reset block 7, and the rod 18 is inserted into the reset block 7.

[0052] The hole on the reset block 7 is a circular hole structure, and the insertion rod 18 is inserted into the circular hole, so that the reset block 7 can slide along the direction of the insertion rod 18.

[0053] Specific implementation method eight: Combination Figure 6 and Figure 7 This embodiment describes a robotic arm clamping device in which the left rotating clamp 3 and the right rotating clamp 4 have the same structure, and both ends of the left rotating clamp 3 and the right rotating clamp 4 adopt an eagle beak structure.

[0054] The outer beak structures of the left rotating clamping plate 3 and the right rotating clamping plate 4 mainly press down on the inner hole plane 21 of the clamping workpiece 20, while the inner beak structures of the left rotating clamping plate 3 and the right rotating clamping plate 4 mainly contact the floating block 5. When the floating block 5 touches the left rotating clamping plate 3 and the right rotating clamping plate 4, it causes the left rotating clamping plate 3 and the right rotating clamping plate 4 to rotate, thereby completing the clamping work of the left rotating clamping plate 3 and the right rotating clamping plate 4.

[0055] Specific Implementation Method Nine: Combining Figure 8 and Figure 9 This embodiment describes a robotic arm clamping device. The reset block 7 has an inclined structure below it. When the reset block 7 moves vertically downward, the inclined structure fits against the inclined surfaces of the left rotating clamping plate 3 and the right rotating clamping plate 4, causing the left rotating clamping plate 3 and the right rotating clamping plate 4 to rotate.

[0056] When the reset block 7 moves vertically downward, the inclined structure on the reset block 7 will contact the inclined surfaces on the left rotating clamping plate 3 and the right rotating clamping plate 4. When the reset block 7 contacts the left rotating clamping plate 3 and the right rotating clamping plate 4, it will drive the left rotating clamping plate 3 and the right rotating clamping plate 4 to rotate synchronously, so that the outer beak structure of the left rotating clamping plate 3 and the right rotating clamping plate 4 will rotate into the clamping plate groove 20 in the top cylinder platform 1, which makes it easier to remove the clamped workpiece 21.

[0057] Specific Implementation Method Ten: Combining Figure 1 — Figure 9 This embodiment describes a robotic arm clamping device, wherein a clamping workpiece 21 is placed on the base 16, and the clamping workpiece 21 has an inner hole plane 22.

[0058] Working principle:

[0059] When clamping the workpiece, first place the workpiece on the base 16 of the worktable. The base 16 provides support for the workpiece. Start the motor 12, which drives the lead screw 11 to rotate. When the lead screw 11 rotates, the two threaded sleeves 10 on the lead screw 11 move horizontally along the direction of the lead screw 11. When the two threaded sleeves 10 move synchronously in opposite directions, they drive the rotating rod 9 to rotate synchronously. The rotating rod 9 is connected to the sliding arm 2 through the ear plate 8. Therefore, the rotating rod 9 pushes the sliding arm 2 to move vertically upward in the sliding 17. The front of the sliding arm 2 is rotatably connected to a floating block 5. When the sliding arm 2 moves vertically upward, it drives the floating block 5 to move synchronously, causing the plane of the floating block 5 to rotate with the left rotating clamp 4 and the right rotating clamp 5 respectively. The left rotating clamp 4... When the right rotating clamp 5 rotates, the outer beak structures of the left rotating clamp 4 and the right rotating clamp 5 press down onto the inner hole plane 22 of the workpiece, thereby clamping the workpiece through the left rotating clamp 4 and the right rotating clamp 5. After the workpiece is processed, the motor 12 rotates in the opposite direction, and the motor 12 drives the lead screw 11 to move the two threaded sleeves 10 on the lead screw in the opposite direction horizontally, thereby causing the sliding arm 2 to move vertically downward. The sliding arm 2 drives the reset block 7 to move synchronously. When the reset block 7 moves vertically downward, when the inclined surface of the reset block 7 is in contact with the inclined surface of the left rotating clamp 3 and the right rotating clamp 4, the reset block 7 will drive the left rotating clamp 3 and the right rotating clamp 4 to rotate, thereby causing the left rotating clamp 3 and the right rotating clamp 4 to rotate into the clamping groove 20 in the top cylinder frame 1, and the clamped workpiece 21 is taken out from the top cylinder frame 1.

[0060] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present utility model's technical solution, based on the technical essence of the present utility model and within the spirit and principles of the present utility model, shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A mechanical arm clamping device, characterized in that, It includes top cylinder bench (1), sliding arm (2), left rotating clamp plate (3), right rotating clamp plate (4), floating block (5), floating block pivot (6) and reset block (7); The top cylinder bench (1) is respectively provided with sliding arm (2), left rotating clamp plate (3), right rotating clamp plate (4) and floating block (5), the sliding arm (2) is installed in the middle position of the top cylinder bench (1), and the top cylinder bench (1) vertically slides in the top cylinder bench (1), the left rotating clamp plate (3) and the right rotating clamp plate (4) are rotatably connected between the top cylinder bench (1), the sliding arm (2) is fixedly connected with reset block (7) near the top end position, the longitudinal center line of the reset block (7) and the longitudinal center line of the floating block (5) are on the same plane, the floating block (5) is rotatably connected between the sliding arm (2) through the floating block pivot (6), when the top plane of the floating block (5) is in contact with the left rotating clamp plate (3) and the right rotating clamp plate (4), the floating block (5) drives the left rotating clamp plate (3) and the right rotating clamp plate (4) to rotate. The both sides of the top cylinder bench (1) are provided with clamp plate grooves (20), and the left rotating clamp plate (3) and the right rotating clamp plate (4) rotate in the clamp plate grooves (20).

2. The mechanical arm gripping device according to claim 1, characterized in that, The both sides of the sliding arm (2) are symmetrically connected with the ear plate (8), one end of the ear plate (8) is rotatably connected with the shaft body, the other end of the rotating rod (9) is rotatably connected with the side surface of the threaded sleeve (10) through the shaft body; The threaded sleeve (10) is screwed into the lead screw (11), one end of the lead screw (11) is rotatably connected with the output shaft of the motor (12).

3. A mechanical arm gripping device according to claim 2, characterized in that The lead screw (11) is a bidirectional threaded lead screw structure, and when the lead screw (11) rotates, the two threaded sleeves (10) move horizontally along the direction of the lead screw (11).

4. A mechanical arm gripping device according to claim 2 or 3, characterised in that, The lead screw (11) is rotatably connected with the bearing seat (13), the bearing seat (13) is installed on the column (14) of the workbench, and the column (14) is vertically connected with the table plate (15) at the top to form a workbench.

5. A mechanical arm gripping device according to claim 4, characterised in that, The top of the workbench is connected with the annular base (16), the middle position of the workbench is provided with a sliding hole (17), the sliding arm (2) is inserted into the sliding hole (17), and the sliding arm (2) vertically slides in the sliding hole (17).

6. A mechanical arm gripping device according to claim 5, characterised in that, The top plate of the top cylinder bench (1) is provided with an insertion rod (18), the insertion rod (18) is vertically fixedly connected with the middle position of the top plate of the top cylinder bench (1), the insertion rod (18) is sleeved with a compression spring (19), and the bottom of the compression spring (19) abuts against the top end of the reset block (7).

7. A mechanical arm gripping device according to claim 6, characterised in that, The reset block (7) is provided with a hole for inserting the insertion rod (18), and the insertion rod (18) is inserted into the reset block (7).

8. The mechanical arm gripping device according to claim 1, wherein The left rotating clamp plate (3) and the right rotating clamp plate (4) are the same structure, and the both ends of the left rotating clamp plate (3) and the right rotating clamp plate (4) adopt the hawk mouth structure.

9. The mechanical arm gripping device according to claim 7, wherein The reset block (7) has a slope structure below, which matches with the slope at the left rotating clamp plate (3) and the right rotating clamp plate (4) when the reset block (7) moves vertically downward, and drives the left rotating clamp plate (3) and the right rotating clamp plate (4) to rotate.

10. The mechanical arm gripping device according to claim 5, wherein The base (16) is provided with a clamped workpiece (21), and the clamped workpiece (21) has an inner hole plane (22).

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